Authors:
Sebastian Haner
;
Linus Svärm
;
Erik Ask
and
Anders Heyden
Affiliation:
Lund University, Sweden
Keyword(s):
Underwater Imaging, Camera Calibration, Refraction, Stitching.
Related
Ontology
Subjects/Areas/Topics:
Applications
;
Computer Vision, Visualization and Computer Graphics
;
Human-Computer Interaction
;
Image and Video Analysis
;
Methodologies and Methods
;
Motion and Tracking
;
Motion, Tracking and Stereo Vision
;
Pattern Recognition
;
Physiological Computing Systems
;
Sensors and Early Vision
;
Software Engineering
;
Video Analysis
Abstract:
This paper describes a multi-camera system designed for capture and tracking of swimmers both above and
below the surface of a pool. To be able to measure the swimmer’s position, the cameras need to be accurately
calibrated. Images captured below the surface provide a number of challenges, mainly due to refraction
and reflection effects at optical media boundaries. We present practical methods for intrinsic and extrinsic
calibration of two sets of cameras, optically separated by the water surface, and for stitching panoramas
allowing synthetic panning shots of the swimmer.